FINAL MATLAB STRUCTURE

VARIABLES

Basis_UTM	GNSS Base Station Position in UTM32N coordinates
h		GNSS Base Station ellipsoidal height in m
lat		GNSS Base Station Latitude in °
lon		GNSS Base Station Longitude in °
Pos_ENV		Tachymeter data
survey		structure containing processed magnetic and IMU data

DETAILS

Pos_ENV TABLE STRUCTURE
PtID		Point ID
East		East in m (not referenced to True North)
North		North in m (not referenced to True North)
Height		Height in m, relative to Tachymeter Base
East_rot	East in m (referenced to true North)
North_rot	North in m (referenced to true North)
East_abs	East in m (UTM32N, machting GNSS coordinates)
North_abs	North in m (UTM32N, machting GNSS coordinates)
Anomaly_Label	ID of Anomaly where applicable, from line 22 (PtID 20) onward, the number refers to the number of Nd balls used to create the corresponding anomaly
Height_abs	ellipsoidal height (matching GNSS coordinates)
M_abs		norm of magnetic moment in Am² measuered in lab measurements where applicable, from line 22 onward, the value is an approximation
Dek		declination of magnetic moment in ° in geographical coordinates
Ink		inclination of magnetic moment in ° in geographical coordinates
M		magnetic moment vectors in Am² calculated from norm, cedlination and inclination in geographical coordinates
r		radius of anomaly source in m where applicable
L		length of anomaly source in m where applicable
V		anomaly source volume in m³ where applicable
a		large semi-axis of equivalent ellipsoid (Beleggia et al. 2006)
c		small semi-axis of equivalent ellipsoid (Beleggia et al. 2006)

survey:
mag_final	table containing processed magnetic data and corresonding GNSS positions
flight#		structure for each flight of the survey containing reoriented data before final processing steps (concatenation, vibration filter)

survey.flight#:
B_IGRF		IGRF-13 magnetic reference field
IMU_crop	processed IMU data
Rot_IMU_Mag	misalignment angles between IMU and magnetometer sensor 1
mag_out		reoriented magnetic data and GNSS positions for each sensor

MAGNETIC DATA TABLE STRUCTURE (mag_out, mag_final)
MAG_POSIXtime	magnetometer time (POSIX)
status		GNSS PPS Sync flag
time		UTC time
B1		calibrated Sensor 1 data in nT
B2		calibrated Sensor 2 data in nT
BT1		Sensor 1 TMI in nT, calculated from B1
BT2		Sensor 2 TMI in nT, calculated from B2
TE		Datalogger Electronics Temperature in °C
TS1		Sensor 1 Temperature in °C
TS2		Sensor 2 Temperature in °C
E		East Component of GNSS Antenna Position in m (UTM32N)
N		North Component of GNSS Antenna Position in m (UTM32N)
height		Ellipsoidal height of GNSS Antenne in m
utmzone		UTM Zone
B1_Reor		reoriented Sensor 1 data in nT
B2_Reor		reoriented Sensor 2 data in nT
q_IMU_mag	rotation quaternion used for reorienting magnetic data (B1->B1_Reor, B2->B2_Reor)
Pos_GPS		Position of the GNSS Antenna relative to the Attachment point of the boom in m (in geographic coordinates)
N1		North Component of Sensor 1 Position in m (UTM32N)
E1		East Component of Sensor 1 Position in m (UTM32N)
height1		ellipsoidal height of Sensor 1 in m
N2		North Component of Sensor 2 Position in m (UTM32N)
E2		East Component of Sensor 2 Position in m (UTM32N)
height2		ellipsoidal height of Sensor 2 in m
flag		auxillary variable used for cropping the data (mag_final only)
gradBT		calculated TMI gradient in nT/m (mag_final only)
gradB		calculated component gradients in nT/m (mag_final only)
E_Grad		East Component of Gradient Coordinates in m (mean of Sensor 1 and Sensor 2, UTM32N, mag_final only)
N_Grad		North Component of Gradient Coordinates in m (mean of Sensor 1 and Sensor 2, UTM32N, mag_final only)
height_Grad	Ellipsoidal height of Gradient Coordinates in m (mean of Sensor 1 and Sensor 2)
B2_Reor_korr	reoriented B2 data in nT corrected for vibrations (mag_final only)

IMU_crop TABLE STRUCTURE
time		time in 10 ms
Gyro1		IMU1 Gyro in °/s
Acc1		IMU1 Accelerometer in m/s²
Gyro2		IMU2 Gyro in °/s
Acc2		IMU2 Accelerometer in m/s²
rawtemp		IMU1 and IMU2 temperature data (alternating) in °C
time1		IMU1 internal timestamp
time2		IMU2 internal timestamp
flag		auxillary variable
structCounter	auxillary variable
ECode		auxillary variable
fSyncCounter	auxillary variable
Acc2_cal	IMU2 Accelerometer in m/s², calibrated
Gyro2_cal	IMU2 Gyro in °/s, calibrated
Gyro1_off	IMU1 Gyro in °/s, offset-corrected
Gyro2_off	IMU2 Gyro in °/s, offset-corrected
Gyro1_rot	IMU1 Gyro in °/s, rotated for sensor arrangement
Gyro2_rot	IMU2 Gyro in °/s, rotated for sensor arrangement
Acc1_rot	IMU1 Accelerometer in m/s², rotated for sensor arrangement
Acc2_rot	IMU1 Accelerometer in m/s², rotated for sensor arrangement
Gyro1_int	IMU1 Gyro in °/s, time-interpolated
Gyro2_int	IMU2 Gyro in °/s, time-interpolated
Acc1_int	IMU1 Accelerometer in m/s², time-interpolated
Acc2_int	IMU2 Accelerometer in m/s², time-interpolated
Gyro2_BRot	IMU2 Gyro in °/s, rotated onto MAG Sensor 1 coordinates
Acc_BRot	IMU2 Accelerometer in m/s², rotated onto MAG Sensor 1 coordinates
Acc2_Reor	reoriented IMU2 Accelerometer data in m/s²
q		rotation quaternion